31013203310221 has 8 divisors (see below), whose sum is σ = 33840851441184. Its totient is φ = 28186932847920.

The previous prime is 31013203310101. The next prime is 31013203310357. The reversal of 31013203310221 is 12201330231013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31013203310221 - 2⁹ = 31013203309709 is a prime.

It is a super-2 number, since 2×31013203310221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31013203310192 and 31013203310201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31013203310821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344370091 + ... + 344460136.

It is an arithmetic number, because the mean of its divisors is an integer number (4230106430148).

Almost surely, 2^{31013203310221} is an apocalyptic number.

It is an amenable number.

31013203310221 is a deficient number, since it is larger than the sum of its proper divisors (2827648130963).

31013203310221 is a wasteful number, since it uses less digits than its factorization.

31013203310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688834331.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31013203310221 its reverse (12201330231013), we get a palindrome (43214533541234).

The spelling of 31013203310221 in words is "thirty-one trillion, thirteen billion, two hundred three million, three hundred ten thousand, two hundred twenty-one".